//////////////////////////////////////////////////////////////////////////////
//
// Copyright(C) < 1998 - 2024 > Glodon Company Limited
// Copyright 2003-2023 by Autodesk, Inc. 
//
// Licensed under the MIT License
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
//////////////////////////////////////////////////////////////////////////////

#if Gdmp || Gnuf
using Glodon.Gdmp.DB;
#elif Gap
using Glodon.Gap.DB;
#endif
using Glodon.Lookup.Core.Contracts;
using Glodon.Lookup.Core.ModelBase;
using Glodon.Lookup.Lookup.Core;
using Glodon.Lookup.Models;
using Glodon.Lookup.Services.Enums;
using Glodon.Lookup.ViewModels.Contracts;
using Glodon.Lookup.Models.Descriptors;

using Wpf.Ui.Common;
using Wpf.Ui.Contracts;
using Wpf.Ui.Controls;

using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;

using System.Windows.Input;
using System.Windows.Threading;

namespace Glodon.Lookup.ViewModels.Pages
{
    public abstract partial class SnoopViewModelBase : ObservableObject, ISnoopViewModel
    {
        private readonly ISnackbarService _snackbarService;

        [ObservableProperty] private bool _supressToggleCommand;
        [ObservableProperty] private bool supressTreeSelectedChangedCommand;

        protected SnoopViewModelBase(ISnackbarService snackbarService)
        {
            _snackbarService = snackbarService;
        }

        public ICommand ExitCommand { get; set; }

        public event EventHandler TreeSourceChanged;
        public event EventHandler SearchResultsChanged;

        public virtual async void Snoop(SnoopableObject snoopableObject)
        {

        }
        public virtual async Task CollectMembers(bool useCached)
        {

        }
        protected virtual void OnTreeSelectedChanged(SnoopableObject newObj) { }
        public abstract Task Snoop(DataTabType tab);

        public void Navigate(Descriptor selectedItem)
        {
            if (selectedItem == null)
            {
                return;
            }
            if (!(selectedItem.Value.Descriptor is IDescriptorCollector) ||
                selectedItem.Value.Descriptor is IDescriptorEnumerator { IsEmpty: true })
                return;
            Snoop(selectedItem.Value);
        }

        [RelayCommand]
        private async Task FetchMembersAsync()
        {
            await CollectMembers(true);
        }

        [RelayCommand]
        private async Task RefreshMembersAsync()
        {
            await CollectMembers(false);
        }
        [RelayCommand]
        private void ShowElement(object parameter)
        {
            if (parameter == null)
            {
                return;
            }
            if (parameter is SnoopableObject sn)
            {
                if (GlodonAPI.UiDocument is null) return;
                if (sn.Object is Document doc || sn.Object is ModelView mdv)
                {
                    //todo 缩放匹配
                    return;
                }
                if (sn.Object is not Element)
                {
                    _snackbarService.ShowAsync("提示", "非图元无法居中显示", SymbolRegular.Warning16, ControlAppearance.Caution);
                    return;
                }
                Element? element = sn.Object as Element;
                if ((sn.Descriptor as ElementDescriptor)!.CanShow)
                {
                    Dispatcher.CurrentDispatcher.Invoke(() =>
                    {
                        try
                        {
                            using (Transaction tran = new(GlodonAPI.Document, "scale match"))
                            {
                                tran.Start();
                                try
                                {
                                    GlodonAPI.UiDocument.ShowElement(element!.Id);
                                    GlodonAPI.UiDocument.Selection.SetElementIds(new List<ElementId>() { element.Id });
                                    GlodonAPI.UiDocument.CurrentUIView.Refresh();
                                    tran.Commit();
                                }
                                catch (Exception)
                                {
                                    if (tran.HasStarted())
                                    {
                                        tran.RollBack();
                                    }
                                }
                            }
                        }
                        catch (Exception e)
                        {
                            _snackbarService.ShowAsync("居中显示失败", e.Message, SymbolRegular.ErrorCircle16, ControlAppearance.Danger);
                        }
                    });
                }
                else
                {
                    _snackbarService.Show("提示", $"该元素无法居中显示", SymbolRegular.Warning16, ControlAppearance.Caution);
                }
            }

        }
        [RelayCommand]
        private async void TreeSelectedChanged(object selectedValue)
        {
            try
            {
                var newObject = selectedValue as SnoopableObject;
                if (newObject == null)
                {
                    return;
                }
                await FetchMembersAsync();
                OnTreeSelectedChanged(newObject);
            }
            catch (Exception e)
            {
                SnowException("树选择改变处理异常", e.Message + e.StackTrace);
            }
        }

        protected void SnowException(string title, string message)
        {
            _snackbarService.Show(title, message, SymbolRegular.ErrorCircle24, ControlAppearance.Danger);
        }

    }
}
